smart



L. T. SMART.

Saw Set.v

No. 82,759. i A88881188 om. 8, 1888.

72887288888 t {gg/fi? L. T. SMART, OF OSSIPEE, NEW IIAINIPSHIRE.

Letters Patent No. 82,759, dated October 6, 1868.

IMPROVEMENT IN SAW-SET..

@te tlgthnle referat It it tlgtst tettus atrnt init mating init tf tiptime.

TO ALL WHOMIT MAY CONCERN:

Beit known that I, L. T. SMART, of Ossip'ee, in the county of Carroll,and State of New Hampshire, have invented a new and useful Improvementin Saw-Sets; and I do hereby declare that the following is a full,clear, and exact description thereof, which will enable others skilledin the art to make and use the same, reference being had to accompanyingdrawings, forming part of this specification, in which# Figure Irepresents a sectional elevation of my improvement on the line x a: or"iig. '2.

Figure 2 is a plan view of the same.

Similar letters ot' reference indicate like parts.

The nature of this invention relates to improvements in saw-sets, theobject of which is to provide an adjustable saw-set that can be morereadily adjusted for setting teeth of diierent pitch or inclination thanany now'in use. f I

It consists of a circular bed-die, fitted into a suitable die-holder, soas to turn therein on a vertical axis, which is provided with a squaresocket in its central axis, and with four or any other suitable numberof inclined facets on its upper end, varying in degree of angularity,which serve as the bed on which the teeth are to be hammered to producethe required set, and a movable die, provided with a central shank,which tits in the recess of the bed-die, arranged in combinationtherewith, having a corresponding number of facets, of various degreesof angularity, corresponding with those of the beddie, which issupported in a vertical position therein, and the facets maintained ashort distance above those of'the bed-die by a suitable spring. The hedis provided with gauges, whereby the saw to be set may be presented sothat thc teeth may be suitably acted upon by the said dies when a blowis given to the head of the movable die.

In the drawings, A represents the bed-die, which rests in a circularrecess of a dieholder, B, and is provided With a prolongation extending.through the said die-holder. The latter may be made of any suitablemetal, and secured to any suitable block br bench.

The die A is provided with a socket, C, through the bottom of which is acentral hole.

The top of the die is provided with four or any other desired number offacets, a, inclined from the circumference downward towards the centreof the said die, each having a different inclination.

D represents a movable die, provided with a projection, d, from one endof which fits the socket G of the bed-die. The lower end of the die D isprovided with an equal number of facets, having corresponding varyinginclinations, and tapered from the centre outward.

The projection d has a stemii'xedvcentrally thereto, which projectsthrough a hole in the bottom of the recess C, and provided on its lowerend with a nut, and in the said recess, between the end of theprojection cZ and the bottom of the recess,'with a spiral spring,whereby the die D is maintained a suitable distance above the bed-die,the nut preventing the spring from throwing it out of place. v Y

E represents gauges, pivoted to the block or die-holder B, or otherwiseadjustably fixed thereto.

F represents a set-screw, for securing the bed-die in position, and Grepresents a rest for the saw.

The saw to be operated on is laid on the rest G, as shown in red in iig.I, with the teeth projecting over the face of the die A a suitabledistance, which is gauged by the gauges' E, .and `the upper end of thedie D, struck .with a blow from a hammer, which forces it down upon thetooth, and sets it against the bed-die.

The dies may be adjusted to produce any given set, which may beindicated, by numbers on the dies opposite the facets, by turning themaround to the required position in the holder I3, and securing them bythe setlscrews F.

They may be made of steel, case-hardened iron, or chilled iron, aspreferred. I prefer to make them of chilled iron, as that is thecheapest, and, as far as my experience goes, is equally as durable ashardened steel.

Having thus described my invention, I claim as new, and desire to secureby LettersPa'tent-V The die A, adjusted in the holder B by the screw F,and provided upon its upper face with facets of varying inclinations,corresponding to the inclinations of the facets upon the under side ofthe movable die D, all

constructed, arranged, and operating as herein described and shown, forthe purpose specified.

.l I L. 'I'. SMART.

Witnesses;

Lnvr SMITH, DANIEL SMITH.

